[FR] See Cloud Storage usage

[Xazin]

Description

As a cloud user, I want to be able to see how much storage I have consumed and how much I have available.

Impact

User experience & utilisation of storage.

It can change how users might use the application to a certain degree, but can also help us promote features that come with upgrading to a paid plan.

Additional Context

Notion imposes a limit of "amount of blocks" and shows it in the sidebar: